Final answer:
An I-9 audit reviews compliance with immigration regulations to ensure employees are legally entitled to work in the United States and protect the rights of legal immigrants.
Step-by-step explanation:
An I-9 audit is an audit that reviews compliance with immigration regulations. It is used to verify and record the identity of employees and ensure that each employee is legally entitled to work and reside in the United States. The audit helps employers avoid fines for hiring undocumented immigrants and protect the rights of legal immigrants.